In a new interview, Castle‘s former leading man concedes that the the ABC drama’s series finale — which featured a tacked-on coda that leaped forward seven years and confirmed a happy ending for Rick, Kate and their three kids — was less than perfect.

“It wasn’t the beautiful send-off that I think maybe you could hope for,” Fillion tells the New York Post, before citing the series’ abrupt, 11th hour cancellation as a factor. “It’s the entertainment industry, it’s a business, I get it. I don’t take it personally when a show gets canceled — I can’t take it personally, all my shows gets canceled! Look at my resume, it’s a long list of canceled TV shows.

“The fact is, I made a lot of great friends on a really great show,” he continued. “I’m really happy for everything that that show has done for me.”

Fillion — who kicked off a multi-episode arc on Modern Family last Wednesday — expressed a similar zen attitude about Castle‘s fate over the summer at Comic-Con, positing to TVLine that it’s tough for any long-running show to truly have a “proper send-off.” Check out that video below.